Maryann Xue created CALCITE-1182:
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Summary: Add ProjectRemoveRule to pre-processing program of
materialization substitution
Key: CALCITE-1182
URL: https://issues.apache.org/jira/browse/CALCITE-1182
Project: Calcite
Issue Type: Improvement
Components: core
Reporter: Maryann Xue
Assignee: Maryann Xue
Priority: Minor
In VolcanoPlanner, we apply a simple pre-processing hep program to normalize
the "target" and "query" rels before materialization substitution. Currently
this program runs with two rules: FilterProjectTransposeRule and
ProjectMergeRule.
We need an extra rule ProjectRemoveRule for the Phoenix use case where a
secondary index (modeled as materialized views) is defined on a view so the
materialized view "queryRel" may have an identity projection introduced by this
view.
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